This study investigated the effect of phosphorus chemical solid wastes (phosphogypsum and phosphorus tailings) modified land-making soil on corn quality and its safety evaluation. The artificial soil was constructed by layered reconfiguration process (A process) and integrated land-making process (B process), and the effects of different processes on corn growth, yield, nutritional quality and heavy metal content were studied. The results showed that the phosphogypsum geo-constructed soil significantly increased the plant height, stem thickness, biomass and yield of corn, in which the A process and B process increased the yield by 19.34% and 12.71%, respectively. Phosphate tailings land-forming soils, on the other hand, resulted in a decrease in corn yield by 5.84% to 6.47%. Phosphogypsum treatment also significantly enhanced total soluble sugar, protein and vitamin C content of corn. The safety evaluation showed that the heavy metal content in all treated corn kernels complied with the national food safety standards, and the enrichment capacity of heavy metals in the non-edible parts was higher than that in the edible parts. The study showed that phosphogypsum land-forming soil has high potential for agricultural utilization while ensuring the quality of guest soil, and that process A is superior to process B.
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